projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| c17f9c90 | 2 | /* |
| 2c6118e4 | 3 | * Force feedback support for Logitech RumblePad and Rumblepad 2 |
| c17f9c90 AH |
4 | * |
| 5 | * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com> | |
| 6 | */ | |
| 7 | ||
| 8 | /* | |
| c17f9c90 AH |
9 | */ |
| 10 | ||
| 11 | ||
| 12 | #include <linux/input.h> | |
| 5a0e3ad6 | 13 | #include <linux/slab.h> |
| c17f9c90 | 14 | #include <linux/hid.h> |
| 606bd0a8 | 15 | |
| 606bd0a8 | 16 | #include "hid-lg.h" |
| c17f9c90 AH |
17 | |
| 18 | struct lg2ff_device { | |
| 19 | struct hid_report *report; | |
| 20 | }; | |
| 21 | ||
| 22 | static int play_effect(struct input_dev *dev, void *data, | |
| 23 | struct ff_effect *effect) | |
| 24 | { | |
| 25 | struct hid_device *hid = input_get_drvdata(dev); | |
| 26 | struct lg2ff_device *lg2ff = data; | |
| 27 | int weak, strong; | |
| 28 | ||
| 29 | strong = effect->u.rumble.strong_magnitude; | |
| 30 | weak = effect->u.rumble.weak_magnitude; | |
| 31 | ||
| 32 | if (weak || strong) { | |
| 33 | weak = weak * 0xff / 0xffff; | |
| 34 | strong = strong * 0xff / 0xffff; | |
| 35 | ||
| 36 | lg2ff->report->field[0]->value[0] = 0x51; | |
| 37 | lg2ff->report->field[0]->value[2] = weak; | |
| 38 | lg2ff->report->field[0]->value[4] = strong; | |
| 39 | } else { | |
| 40 | lg2ff->report->field[0]->value[0] = 0xf3; | |
| 41 | lg2ff->report->field[0]->value[2] = 0x00; | |
| 42 | lg2ff->report->field[0]->value[4] = 0x00; | |
| 43 | } | |
| 44 | ||
| d8814272 | 45 | hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); |
| c17f9c90 AH |
46 | return 0; |
| 47 | } | |
| 48 | ||
| 606bd0a8 | 49 | int lg2ff_init(struct hid_device *hid) |
| c17f9c90 AH |
50 | { |
| 51 | struct lg2ff_device *lg2ff; | |
| 52 | struct hid_report *report; | |
| 53 | struct hid_input *hidinput = list_entry(hid->inputs.next, | |
| 54 | struct hid_input, list); | |
| c17f9c90 AH |
55 | struct input_dev *dev = hidinput->input; |
| 56 | int error; | |
| 57 | ||
| 0fb6bd06 KC |
58 | /* Check that the report looks ok */ |
| 59 | report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7); | |
| 60 | if (!report) | |
| c17f9c90 | 61 | return -ENODEV; |
| c17f9c90 AH |
62 | |
| 63 | lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); | |
| 64 | if (!lg2ff) | |
| 65 | return -ENOMEM; | |
| 66 | ||
| 67 | set_bit(FF_RUMBLE, dev->ffbit); | |
| 68 | ||
| 69 | error = input_ff_create_memless(dev, lg2ff, play_effect); | |
| 70 | if (error) { | |
| 71 | kfree(lg2ff); | |
| 72 | return error; | |
| 73 | } | |
| 74 | ||
| 75 | lg2ff->report = report; | |
| 76 | report->field[0]->value[0] = 0xf3; | |
| 77 | report->field[0]->value[1] = 0x00; | |
| 78 | report->field[0]->value[2] = 0x00; | |
| 79 | report->field[0]->value[3] = 0x00; | |
| 80 | report->field[0]->value[4] = 0x00; | |
| 81 | report->field[0]->value[5] = 0x00; | |
| 82 | report->field[0]->value[6] = 0x00; | |
| 83 | ||
| d8814272 | 84 | hid_hw_request(hid, report, HID_REQ_SET_REPORT); |
| c17f9c90 | 85 | |
| bd04363d | 86 | hid_info(hid, "Force feedback for Logitech variant 2 rumble devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); |
| c17f9c90 AH |
87 | |
| 88 | return 0; | |
| 89 | } |